The Gothenburg Study of Children with DAMP was a study of six-year old children in Gothenburg, Sweden that began in 1977. The purpose was to find out what proportion of the children had DAMP (initially called MBD) and to follow the development of that group over the years. The results and discussions have been published in four dissertations and about 30 scientific papers.

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The first phase of the study was designed mainly by Christopher Gillberg and Peder Rasmussen. Initially, preschool teachers in all areas of Gothenburg were asked to answer a questionnaire with a series of yes and no questions to identify children that possibly had MBD. (The questionnaire was based on an earlier pilot study.) The researchers used a purely operational (symptom-based) definition of MBD that had been devised especially for the study and was later termed DAMP.

The researchers received questionnaires for more than 3400 children. which constituted around 72% of the total population. 340 children (10%) were identified, based on the questionnaires, as having problems that could indicate MBD. Out of this group of 340, all the children that seemed to have the most severe problems and a random sample of the others were selected for a detailed examination

In the Gothenburg study, a questionnaire for preschool teachers was used from which children with some potential psychiatric problems were classified into either a high-index or a low-index group. In the final investigation, there were 22 children (14 boys and 8 girls) in the high-index group and 60 children (52 boys and 8 girls) in the low-index group.[1] These were compared with a randomly-selected control group. The control group ultimately consisted of 59 children (29 boys and 30 girls).[1] Of the total of 141 children, 42 (33 boys and 9 girls) were diagnosed as having MBD/DAMP; of the 42, 40 were in the index group (18 in the high-index group) and 2 in the control group.[1] All the children were initially age 6–7 (born 1971) and were from Gothenburg, Sweden.[1] The children were later investigated at ages about 10, 13, 16, and 22.[2]

Leif Elinder, a Swedish pediatrician and Eva Kärfve, a sociologist at the University of Lund, had for a number of years written numerous article and a book where they rejected most of neuropsychiatry, and specifically most research carried out by the Gillberg group. In 2002 they demanded access (as private persons) to all the records from the Gothenburg Study and wrote letters to Gothenburg University where they accused Gillberg and Rasmussen of scientific misconduct. The specific accusation was that they had added participants to the control group for the final follow-up study at age 22. The accusations were investigated by the Ethics Council at the University of Gothenburg and dismissed as baseless. (The only supposed "evidence" of wrongdoing provided by Elinder and Kärfve was that the drop-out rate in the follow-up study was low.)

Kärfve and Elinder were not satisfied with this dismissal and continued to demand access to the medical records. In their letters, they did not refer to allegations of scientific misconduct but to the necessity to investigate the basis for medical practice in Sweden. They were denied access by Gothenburg University and the researchers, on the grounds that the material contained highly sensitive data, that the participants had been promised full confidentiality, that Elinder and Kärfve would use the material as private citizens, and that the participants were strongly against giving them access. Elinder and Kärfve then took the matter to court, where it was decided that they would be allowed full access to the research material.[3]

The researchers and the university tried to use all legal possibilities to avoid giving out the medical records which constituted 22 shelf meters (about 100.000 pages, video and sound recordings.[4]

In May 2004, when it appeared that the university would be forced to hand the material over, three of Gillberg's coworkers decided to destroy most of the research material. In June 2005, Gillberg and the Rector of Gothenburg University were convicted for not handing the material over to Kärfve and Elinder. Gillberg received a suspended sentence and a fine; the Rector received a fine.[3] In March 2006, the three coworkers were convicted for destroying the data. Each of the three received a suspended sentence and a fine: Peder Rasmussen, Carina Gillberg (wife of Christopher Gillberg), and Kerstin Lamberg.[4]

Lamberg is vice-chairman of the Autism (Patients) Society (Riksföreningen Autism).[5] Both the Autism Society and the Attention (Patients) Society (Riksförbundet Attention) have remained strong supporters of Gillberg.[6][7]

In 2005, Per-Anders Rydelius, Professor of Child Psychiatry at the Karolinska Institute, and Rolf Zetterstrom, past chief editor of Acta Paediatrica, have been critical of some research based on the Gothenburg study. In the Swedish trade journal Dagens Medicin.[8] they argued that the Gillberg group, in order to prove their hypothesis, repeatedly changed diagnoses and information in their material: "Accessible articles (from the Gillberg group) reveal that those studied have been managed in an unscientific way - a conclusion which does not need strengthening by what could have been found in the destroyed research material". (Another problem is the boy:girl ratios in the study;[1] the ratio in the control group is 1:1, whereas the ratio in the index groups is 4:1.)